Thin-place-detecting mechanism for looms.



"JJBELAVANGEJ I v 'THIN PLAGBDETBGTING MECHANISM FOR LOOMS.

APPLICATION IILED J ULY 16,1908.

Patnted Apr. 1909?" Merv/X077 J. BELAVANGE.

, THIN PLACE DETECTING MECHANISM FOR 1.00MB.

APPLICATION FILED JULY 16.1908.

918,645. Patented Apr. 20, 1909.

2 BHIJBTSSHEET 2.

- Massachusetts; ha've invented an Improvethe drawing representing liketee Bate-v e To alZavhom-alt may concern Beit known that I, JOs cPI-IBELAVANCIJ,

a cltlz'en of the United States, and resident Webstencount-y ofWorcester, State of ment "in Thin: Place Detecting h Ieehanism for ofwhich the following descrip-.

v tioii; :in connectionwith the a-ccompanying drawing, is specification,likeniimerals on arts. absence of one or more plcks of filling in clothbeii'i'g woven on a loom gives rise ,to *a' thin placeor streak anddamages the I cloth,' and various devices 15 have been, constructed todetect quickly the faultfind 'efltzctjloom stoppage promptly inorder-that the weaver may correct matters, the imoref proinptly the thinplace is detecttd the less' ;wo1'k devolving upon the .2 weavercorrecting the fault. 4

So fares I am aware the thin-place detectors l eretofore proposed haveincluded -,';a detect ng finger normally resting upon the cloth inadvance" ofthe fell, and as near thereto has.possible, the fingerdropping through the clotliwhen the thin place is 'reachedand causing achange in the operaz tion of the loom, such as stoppage thereof, byasuitable mechanism.

In- (my, present invention I :mount the detectoron the lay, saiddetector, being in the nature- 0f a, loose reed, and so constructed andarranged that as the lay'moves forward to heat inthe filling thedetector comesiupwagainstathe fell. ,Should thefilling bepres'entitisdetected by the detector andithe normaloperation of the loom con-*-tinues,-but if the filling is absent, thus giving rise to a-thin-placeor streak, the abseneeis at once detected by the detector andan'immediate change in the operation of the loomgi'sefiected. Herein Ihave arranged *sucl-ichange in operation to be a stoppage ofthe%1ootn-,"- so {that-the weaver can at once i correcti'the'fault andwithout undue labor.

, he various novel features of my inven- ;tion jwillbe fully describedin the subjoined specifi t ion anr l particularly pointed out in thefollo'wing'cla-ims.

Figiire 'li's a partial transverse sectional View" f ort'ionofa 10cmwith thin-place detic lug-mechanism applied thereto embody-m "one fornrof my inyention, the lay in its backward position; Fig. 2 1s a being Ma"; n'r'ivinW; but with the lay so posit oned 'MAssAcHusETTs, ACORPORATION or MAINE.

i Specifieationof Iietters B atent.

Application filedJuly 1c, 1908. Serial No. 443,885.

or-iW BSTER,- MAssaciiUs ETTs, .ASSIGNOR TO DRA The coiirANY, or

, NL-rLAcn DErEC'rInG m ncliemsm'roitnoorisd uimi a, 19025. 1

onits forward beat thatthe'uete'ctor is just at the fell of theclothandin readinessto detect; Fig. 3, a like view, shows thle lay fullyforward at front center, thefiilling being supposed to be present, inorderjto illustrate the normal action'of'the detector; Fig, 4 is a frontelevation'of theyielding support for the bunterthe position-of which iscontrolled by the thin-place detector; Fig, 5 a rear elevation of "aportion ofthe shipper-releasing means, to be referred tof.

Referrin to the drawings the breast beam 1, lay 2 having areed3,;reed-cap or hand-rail fl, lay-sword ,5, shipper '6" only partlyshown at the lower part [of Fig. 1, knock-ofi' arm 7 havinma cam-slottedend 8 to cooperate with the shipper, the rock-shaft 9 on which said armis fixed, and'a second rearwardly extended arin 10 fast on said shaft,may be and'are all snbstantially'o'f usual construction and operate inusual manner.

A bracket 11 secured to the loom, frame below and at the back ,of thebreastfbeam provides a horizontal bearing 12, Fig. 5,; for a shortrock-shaft 13 having de ending from one end a short arm l-l pivot'alyfcon nected by a link 15 with the arm '10, said link being omitted inFigs. 2 and 3. -At the farther end the'rock-shaft 13has fixed to ita'slightly hooked finger -16, nor- 111 119 'sitioned as shown in Figs.1, 2 and 3 but when said finger is swung rearward ithe 15 and througharms 1 and-7 effect, release of the shipper 6 frompitsusual holding.-notch, not shown. The rearward movement rock-shaft 13 will be turned toma thevlinlk thinplace detecting, device when thin place is detected, aswillbe explained I 1 Upon a suitablepla'te 17, attached tothe back ofthe hand-rail 4;,Qpreferablyat the center of the reed, La dependingcarrierlglis -fulcrumed at 19, sald carr er be ngbent suitably tocooperate with vthel back of th e" l ay, the foot 20 of the carrierextending forward under the lay and having a lateral roller or othersuitable stud 21' thereon," stud cooperates with acam-likedetent22mounted on a swinging support 23 haying a'afixedfulcrum24, Flg. 1, and moved torwa'rd bya suitable spring, as 25, when thelay'beats'up,

a depending bracket 26 on 't-helay'having at its lower end a; rearwardlyextended,.forked or slotted guide 27 for the upper end of the 'supportWhen the lay moves back the carrier swings rearward away from the lay,

as in Fig. 1, the stud 21 then abutting against the rear edge of-thedetent, the latter having been moved into the osition shown by thebackward movement "the lay. This causes the thin-place detector 28 to.he retracted out of the shuttle path when the shuttle is picked, saiddetector being made as a thin and flat'upright metal blade, fastened atits rear edge tothe adjacent part. of the carrier 18 and occupying theplace of areed-dent removed for the purpose. By reference to Fig.1 itwillbe seen that when the detector is retracted its front or detect-',ing edge is positioned 'within the reed face,

'Now as the lay the detector at such time to all intents taking theplace .of the dent which it displaces. moves forward after the pick tobeat in the filling the stud 21is dis-' engaged by the stop 22, thelatter moving I out of the wayof the stud, see Fig. 2,owing reachesfront center.

the detector, shown in Fig. 2, or it may be assisted by a light spring29, just strong enough to overcome inertia and friction, but

not interfering with the retracting swing of the detector-carrier whenthe lay reaches hack center. Now, v1ewing.F1g.'2, if'there isno thinplace the filling will of course .be

present at the fell, and-the projected detector willlcngage such fillingand-be held stat-rem; 'ary thereby while the lay continuesonwardto-front center, see Fig.- 3,-the reed beating.

-- in the filling. Thus .thelay will be moved relatively to the detectorand its carrier and the latter will be separated from the hack of- ,thelay, as in Fig. 3,'to thereby depress the arrow-like hunter 30 below thetip of the.

finger. 16, the shank 31 ofthe hunter -b'eing pivotally connected at 32to 'the' c'arrie r. This hunter shank slides through a hole. 33

in'the hracket26 and is yieldinglysustaine'd on a spring-controlledsupport34s carried by the bracket i front of the'hole33; When thehunter. is moved dQWnWard. into inoper-'- ative position, asidescrib ed,throughthe 'detection of the resen'ceof filling by the detector, the,ham ward-movement"ofthe laycannotcausethehunter and finger 16'tocooperate and the loomcontinues: its normal operation. Ongthe other.hand, ifthere is a thinplace and-hence no" filling; at the fell'when-othefpartsare positioned as shown in Fig; 2, the detector-carrierwill move forward with-the lay asthe latter reaches front 65.

.center,; butonfthe backstroke the hunter 30 will engage the fingerglfiand rock the shaft 13, so that through the intervening connections theshipper will he released.-

It shouldhe stated that the spring-com trolled support 34 normally holdsthe bilnter-shank in suchposition that thebunter engagesthe tip ofthefinger 16 and is .de-. pressed therehy as it slides beneath the fingeron the latter part of the forward beat of the lay. 'Referring to Fig. 2it will be seen that the hunter has passed under and beyond the finger,and is positioned by the support 34 back stroke of the .lay unless thidetector inopcratively positions the hunter upon detocoepe'rate-withthe-finger on the next' tection of the presence offilling at the fell.

Viewing'Fig. 3, as the la moves back the hunter 30 is moved away rom thefinger 16, and as the reed retreats from the fell there is a relativemovement of the detector and the laywher'eby the detector-carrier 18and' the lay again assume substantially the relati-ve positions shown inFig. 2, before back center is reached, the detent 22 also moving back.WhenF-the lay reaches hack center it stops momentarily as its movementis re- \".ersed,..andthe momentum of the detectorcarrier swings it,rearward,' as in'Fig. 1, so that'the lug 21 brings up against the rearend of the detent' on the forward stroke, to

retain the detector retracted until the shuttle ispicked. Thereafter theforward swing of the detent'. releases the lug and. the detector ismoved forward ahead of the reed, into detecting position, the huntersnapping under the finger 16, the operative position- ,ing of thedetector being assisted by the spr ng 29.

By'arranging the detector as herein shown ;|n(l.described the detectionof a thin place occurs prlicticallyas soon as it occurs, so

that-thechang'e in the'operation of the loom follows immediately. 2 I

My intention is not restricted to the precise construction andarrangement herein varied or modified, in different particulars by thoseskilled in the art without departing from the spirit and $00 e of myinvention as set forth in the appen ed'claims.

Having fully described my invention, what "1.1 0' shown'and described asthe same'qmayl be I claim as new and desire to secure by Let-- el'sPatent is 1. In a loom, a lay having a reed, a thinplace detectorvpivotally mounted on the lay above the reed and movable. relativelythere to, adapted to engage the fell of the cloth inadvance of the reedas the .lay'beats u presence of filling in'thecloth at the; fo 1arresting the forward movement-of the',dev tector as thelay'movement is.completed, a 1

- thin place due to the absence of one ormore I picks offfillin in thecloth-permitting. the

detector to mo .e' forward with the .1ay,an d' means controlled by thedetector to, fl'ect stoppage 01 the loom when a min the clothis detectedby said detector.

absence of filling at the fell on the beat-up of the lay, a swingingcarrier'pivotally mounted on the lay above and back of the reed todetect at the time of heat up reed and on which the detector is mounted,

;1neans to swing the carrier forward on the beat-up after the shuttle ispicked, whereby the detector is rojected in advance of the reed intodetectlng position, a device to engage the. carrier and temporarily holdit back as the lay beats up, to retain the detector out of theshuttle-path when the shuttle is picked, and means to eifect stoppage ofthe loom by or through detection of filling absence by said detector.

The combination, in a loom having a lay and a reed thereon, of adetector mounted on the lay and movable in advance of the the presenceor absence at the fell of filling laid on preceding picks, and meanscontrolled by said detector to effect stoppage of the loom when saiddetector detects filling absence.

4. In a loom. a lay, a detector mounted thereon to detect presence orabsence of filling at the fell, means to maintain the detector retractedbehind the shuttle path when the shuttle is picked, means to cause thedetector to move forward into detecting position before thelay reachesfront center, and an instrumentality rendered operative to effectstoppage of the loom when filling abscnce is detected by said detector.

place in 5. In a loom,,a lay having a reed, a filling detector movableback and forth between the reed dents, a carrier for said detectorfulcrumed on the lay above and back of the reed, means to govern themovements of the detector and project it beyond the reed after theshuttle has been picked, to engage the filling when present at the felland be arrested thereby before the lay reaches frontceuter, a hunterinoperatively ositioned by such arrest of the detector, and means,actuated by the hunter when filling is absent, to effect stoppage of theloom.

6. In a loom, a lay having a reed, a filling detector movable back andforth between-the reed dents, a carrier for said detector fulcrumed onthe lay above and back of the reed, means to govern the movements of thedetector and project it beyond the reed after the shuttle has beenpicked, to engage the fillin when present at the fell and be arrestedthereby before the lay reaches .front center, a bunter yieldingly heldin operative position, means actuated by the hunter to effect stoppageof the loom, and means governed by the detector to move the bunt-er intoinoperative posit-ion when the detector is arrested by the presence offilling at the fell.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

" "JOSEPH BELAVANCEi lVitnesses:

- Tanasrnonn R. Lnnonor, I

J. C. ZnPLIER-Po'rvm.

